mtg buy a box booster (24ct) Double Masters (2XM) — Twenty Sided You could even seize a piece of Magic history and open one of 500 Serialized Mox Jasper cards (available exclusively in Collector Boosters). Magic the Gathering Bloomburrow Collector

Five mana is quite a lot for the effect, but being a colorless card is a huge boon here, and its not as expensive as it could be

If another effect allows you to play a card for a different alternative cost, including "without paying its mana cost," you can't also choose to pay its web-slinging cost

Search for the Frozen Esper I could see getting blown out by Nature's Claim on White Auracite, but feeding your opponent 4 life is a decently big drawback

MTG Vigilance FAQs Do Creatures with Vigilance have Summoning Sickness

Cabal Therapy Cabal Therapy mostly sees play in Legacy, where its a nasty threat, especially when paired with Gitaxian Probe or other discard effects that reveal your opponents hand

Across the deck, counters are king in every way, which leads me to really vibe with this commander decks playstyle